Die casting machine



Aug. 9, 1949. E. A. GLYNN DIE CASTING MACHINE 3 Sheets-Sheet 1 FiledNov. 6, 1946 WV. N MW 9v Q Q Q m w ow m m hwy mm mm mu mm mm m NN Qm NNmmm w mm INVENTOR EH. Glynn ATTORN EYS 9, 1949- E. A. GLYNN 2,478,657

DIE CASTING MACHINE Filed. Nov. 6, 1946 {Sheets-Sheet 2 m "a Q g t a h my m a m t Q v N Q 1% I m 0 N m R N INVENTOR EA.GZynn Q M M T ATTORNEYSPatented Aug. 9,1949

' U NiTE B STAT-E55 PATENT GFF- l CPE um @AS'TING :Edwin a, hit-am, moatpant, assignor tt s er Mold floi'poration of California, Lodi, Calif.Amman-"November 6, 194B, seriai'No. 708;1 r1' 1 This invention isdirected to -"a' rieeeeae meiSiiine Tor the tire tread design on matrixlt'laziks tar tire =retreeding or'reeapeine ap- 'pa-ra ttis the tresentiri e'ntlbfi rp'r e'sfitmg movements on the tie-eastmemaenme shown inUnited States *Patentwo. 13989338. V

--one object of "the invention is to prbvide a -clie casting maritime,er the type described, wherein the tire tread designz-is-zcastmnto thematrix blank sectionally as before, but here withgreater ease, raster,and With more safety to the operators.

Another object of "the present invention is to rovide a die*castingma'ehine, as ram-wherein the die block newer actuated to: theiputhose or quickly advancing ft thwart and away .Irbm the matrix, anditb maintain such the block .in inositive fcontact during the tr atingoperation.

further object of the invention is th provide a novel mount for thematrix blank arranged ffor ease ti movement eff fs'a'id firan'k to andfrom the eastmg platform; fer bf the :matrix blank step by step the-se'eti'oital tasting eperations; "and for-tilting off the matrixiblar'ikupwardlyon the sideadjahent platform "to such blank away the"metal remaining in An additional "dbject *oir th'rsinventibn-iis toprovide at-safety sy tem arranged ?'to minimize the possibility are, thetasting operation being"starteii, accidentally, before the die 15161251:is 1h ipiis'itfdn fol-use.

A further tweet thelinvfentionisite 'iarnduce a practical :iiie tastingmahinefwhidh will be highly efiective Ibr the jiurpoisefor "which it isd si' fi I r These obire'c'ts are aecnm iifshed by means bf "suc'hstructure and relative 1 fhairts as will "fully *appe'arhy fa perusaltithe following specification and claims.

Inth'e drawings:

'1 a side lemtioh JOY *the iiiii'p'irbvcd Hie tasting machine. 7 I

Fig. 2 is a sectional "elevation itnereo'r.

.F'i'g. 3 its a fragmentary plan View of themower atituatedyoke assemblyextracted to advance and retract "the cue block, and to 'inaih'tain said.die block, during a casting nperationin positive con- 'tact withfhematfixiblaiik; I

Fig. i4 is .a Ztraginentary rend elevation of the niount .for thelchuckwhich-supports :thezmatrix b 9.111;. 1

Fig. 5 is=ah1an view, detached, of the ichuck .for themat'riik-hlank. d

Referring now more artixiularhr to the characters of referencehnthedrawings, itheiimpreved die-casting machinecompnses a :base :I havingan upstanding frame 22 thereon, such 2 sup- ;porting a verticalfirebox*3 having burners or flame jets l red i'a ituel time 5.

A melting not 6 depends amortized-matrix its upper end, and catith'e'tbp the imeltingt-pot -16 in'cmdes-a-removahIe ihuthormallyilbckedicover "I, by means of which die casting .rnetalmayhesintrtdueediintesaidnot.

4A vent foriflue 2'8 leadsffrom the firebo'xfi at the top thereof. Thel-machine includes :a pyrometer *9 having a icontroi line JDf.1eading:.into the melti-ng' pot 6, whereby "the temperature within the"latter :is accurately :indicate'd exteriorl'y of the machine.

At the "top, land :at :one side thereof, the :firehox 2 supports ahorizontal platform ll, having an foutwarlilyzfia'cmg concave back wall.12.

, the :meiting' 150 t 6 upwardly thrnu'gh the top thereof, andopensithroug hzthe backw'ail {2; the lporti on :of the time 13radfjacent said back wall dieing iormed in adjacent :relation to :aheating nhaznb'er EM integral with :said sidewall, heated Ifrom ihefirebox- 3 Ari-zany suitable :manner, as by a passageway 5125. Theheating :zihamider is as at 126.

:Fluid hie oastin metal, :from theimelting "not 6, can ibfe iiforcefullydischarged throu'th the reed :13 by means-15f :air underpressureiintro'duced :into said melting put by a-conduit flr'l whichtextends from-ia source (not shown) iofair pressure. at valve 18 isinterposed in the conduit IEI and inzilndesa control shaft 19 having 1ahandle 20 on one end thereof. .Tn-oneiposition .o'f th'e ihanflle illairiundenpressure delivered'tononduit :I (,uihile in another j-positionthe fair is vented -through an butletll.

The shaft l9 .andhandlefllareinormallymaintainedin position with thevalve 1I-8 vented ithroug'h outlet 2-1., and this .is accomplished :hymeans :of a solenoid 22, whose plunger 23 inormally :errga'ges inalockingseat :24 "in said shaft 48. The solenoid :22 is interposed in an'ormall'y open control circuit :25 which includes a signal :light 26adjacent the station for the operator of the :handle 20, While anormally open :switch 21 :is includedin said circuit at adjacent thestation for the operator who attends to positioning of the die-b1ock,-as;Wi1l hereinafter appear.

outwardly of the horizontal platform Llythe machineinchides anadjustable spider chuck, in- \dicated generally at 28, for :an annular.matrix "such assembly being operated by an 'iipstanding she-ft carryinga hand wheel '36 on its upper end. When the die casting machine islhusethe 3 annular matrix blank 29 is supported, in internally clampedrelation, by the chuck heads 30 in the manner illustrated.

The above described adjustable spider chuck is turnably mounted on anupstanding boss 31 which projects into a matching bore in the hub 33,and said boss is fixed on a transverse rocker shaft 38. The rocker shaft38 is mounted, at opposite ends, by means of goosenecks 39 to a crossbeam 49 having depending end posts 4| threaded through hand wheels 42.

The depending end posts 4| extend downwardly into tubular legs 43connected at the top by a cross beam 44, and the hand wheels 42 bearagainst said cross beam from above, whereby rotation of such hand wheelseffects vertical adjustment of the posts 4| for the purpose of levelingthe spider chuck 2B.

The legs 43 are connected adjacent the bottom by an axle 45 havingwheels 46 which run on a pair of transversely spaced, horizontal tracks41. The legs 43, connected together as described, thus provide anupstanding, horizontally movable frame, indicated generally at 48, whichmovement is in a direction lengthwise of the machine, i. e. in thedirection that the concave back wall l2 faces.

Such movement of the frame 48 is guided y guide rods 49 which extendhorizontally from the legs 43 through guide sleeves fixed on theupstanding frame 2, as clearly shown in Fig. 1.

A die block 5|, of limited segmental extent, is formed with an arcuateworkin facehaving a tire tread design 52 cut therein; such die blockbeing adapted to engage the matrix blank 29, in matching relation, onthe inner face of the latter.

The annular matrix blank 29 is drilled about its entire circumferencewith a plurality of sets of ducts 53 adapted to establish communicationbetween the upper end of the feed pipe l3 and the design 52 on the dieblock, when the adjacent portion of the matrix blank 29 is seated on theplatform H and clampingly engaged between the matching concave back Wall|2, and die block 5 I, in the manner shown in Fig. 2.

The horizontal platform II, with the upstanding concave back wall l2,and the cooperating die block 5|, form what may be termed the Worksupporting and casting assembly.

The matrix block 5| includes a guiding handle 54 by means of which anoperator guides said block to proper position for engagement with thematrix blank, but movement of such block and its positive contact withsaid matrix blank is accomplished by power means as follows:

The die block 5| is fittted with a rigid shank 55 which extends at anupward and inward incline relative to the axis of the spider chuck 28,and a post 56 is fixed in connection with and depends through said chuckto a termination therebelow. The post 55 is included in a yoke assembly,indicated generally at 51, which straddles the firebox 3 and extends toa'termination on the opposite side of said firebox from the platform Theyoke assembly 51 comprises, with said post 56, a pair of rearwardlydiverging arms 58 which connect, at opposite ends, with downwardextensions 59 on the upper ends of a pair of transversely spaced,inclined side rods 60, which side rods are connected, at their outerends, by a cross head 6|.

Intermediate their ends the side rods 60 run through guide sleeves 62fixed on opposite ends of a cross shaft 63 journaled in brackets 64 onthe firebox3.

A fluid pressure actuated power cylinder 65 is fixed in connection withthe cross shaft 63 and Projects toward the cross head 6|; said cylinderincluding a piston rod 63 connected to such cross head.

The angular position of the yoke assembly 51 is adjusted, in order toset the correct elevation of the die block 5|, by means of a segmentalgear 61 on the cross shaft 63 in mesh with a worm pinion 68 on a shaft69 turnably mounted in connection with the firebox; said shaft having ahand wheel 1|] on its upper end. By adjusting the hand wheel 10, thecross shaft 63 is rotated to change the angle of guide sleeves 62, andconsequently the working or angular position of the yoke assembly 51. 7

Movement of the die block 5| toward or away from the annular matrixblank 29 is accomplished by operation of the power cylinder 65,which isof double acting type, as shown.

The cylinder is included in a fiuid pressure system (not shown), valvecontrolled by the operator who manually guides the die block.

Operation In operation of the above described die casting machine, anannular matrix blank 29 is first clamped in the spider chuck 28 and thenthe movable frame 48 is shifted in a direction to engage said annularmatrix blank 29 against the concave back wall |2 in matching relation;said matrix blank then seating flush on the platform II by reason ofproper adjustment of the depending end posts 4|.

The post 56 of the yoke assembly 51 projects upwardly through the matrixblank 29 and supports the die block 5| within said blank.

As guided by the handle 54, the die block 5| is brought into positivematching engagement with a segment of the matrix blank 29, with thedesign 52 in matching relationship to one set of the ducts 53 as formedin said blank in circumferential relation. This positive contacting ofthe die block 5| with the matrix block 29 is efiected by operation ofthe power cylinder 55 in a direction to advance the piston rod 65, whichimparts a like motion to the yoke assembly 51.

With the die block so contacting the matrix blank the operator, whoguides said block to position, then closes the switch 21 which isadjacent his station. When this occurs the signal light 26 isilluminated and the solenoid 22 energized, causing the plunger 23 toretract from the looking seat 24 in the shaft l9.

Thereafter the other operator who is adjacent the handle 20 turns thelatter so that air under pressure delivers through the conduit |1 intothe melting pot 6, creating a pressure in the latter. When this occursmolten or fiuid die casting metal is forced from the melting potupwardly in the feed pipe I3, and into the ducts 53 and tread design 52.I

The above die casting operation is repeated, step by step, about theentire circumference of the matrix blank 29 until a continuous andunbroken tread design is formed on saidblank. Q

Between each of the segmental die casting operations the die block 5| isof course released from the matrix blank 29 by reverse operation of thecylinder 65, and with the die block 5| so released, the blank 29 istilted upwardly from the platform so as to efiect a breaking away of anymetal adherent between the ducts 53 and the feed pipe I3. This tiltingor canting of the matrix blank 29 is accomplished by swinging the spiderchuck 28 about rockershaft 38 as an axis. 1

The step-by-step turning of the matrix blank 29 may be accomplishedeither by rotating the chuck 28, or by loosening said chuck and rotatingsaid blank thereon; it being obvious that the full extent of rotationcannot be obtained solely by turning the chuck, for the reason that thepost 58 projects between the spider arrangement of the guide rods 32 ofsaid chuck.

Breaking away of the matrix blank 29 from the platform II and back wall12, after each segmental die casting operation, is facilitated by apusher block 1| on the yoke assembly 51, which pusher block engages thematrix blank and urges the same upwardly when said yoke assembly isshifted by the power cylinder in a direction to retract the die block 51from its working position.

From the foregoing it will be readily seen that there has been producedsuch a device as substantially fulfills the objects of the invention asset forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

Having thus described the invention, the following is claimed as new anduseful, and upon which Letters Patent are desired:

1. A machine for die casting tread designs on a preformed annular matrixblank, comprising a frame, a matrix blank support and tread designcasting assembly mounted on the frame, said assembly including asegmental die block adapted to matchingly engage the matrix blank, meansmounting the die block for movement between a position free of thematrix blank to a position in positive contact therewith, said meansincluding a member adapted to extend into the matrix blank, the dieblock being fixed in connection with the member, a fluid pressureactuated power cylinder mounted in connectionwith the frame, andactuating means between the cylinder and member arranged to causemovement of the die block between a position free of the matrix blank toa position in positive contact therewith; said actuating means includinga cross shaft, a sleeve radially mounted on the shaft, a rod slidablethrough the sleeve, the rod actuating said member, and means to adjustthe relative position of the shaft and sleeve and correspondingly theworking position of the die block, the power cylinder being attachedbetween the shaft and the rod,

2. A machine for die casting tread designs on a preformed annular matrixblank comprising an upstanding frame, a matrix blank support and treaddesign casting assembly mounted on the frame, said assembly beingadapted to support a circumferential portion of the matrix blank withthe axis of the latter generally vertical, a die block included in saidassembly, means mounting the die block for radial movement within thematrix blank between a retracted position free of said blank to anadvanced position in positive contact therewith, and a fluid pressureactuated power cylinder operative to effect such movement; said mountingmeans including an actuating yoke extending radially away from thematrix blank below the same, said yoke having spaced, parallel siderods, a cross shaft supported from the frame, guide sleeves radiallymounted on opposite ends of the shaft, the rods slidably projectingthrough the sleeves, a cross head between the rods in spaced relation tothe shaft, the power cylinder being connected between the shaft andcross head, a post on the yoke extending into the matrix blank andsupporting the die block, and means to adjust the rotative position ofthe shaft so as to correspondingly vertically adjust the die block.

3. A machine for die casting tread designs on a preformed annular matrixblank comprising an upstanding frame, a firebox mounted on the frame andenclosing a melting pot, a matrix blank support and tread design castingassembly mounted on top of the firebox, said assembly being adapted tosupport a circumferential portion of the matrix blank with the axis ofthe latter generally vertical, a die block included in said assembly,means mounting the die block for radial movement within the matrix blankbetween a retracted position free of said blank to an advanced positionin positive contact therewith, and a fluid pressure actuated powercylinder operative to effect such movement of the die block; saidmounting means including an actuating yoke extending radially away fromthe matrix blank below the same and straddling the firebox, the yokehaving spaced, parallel side rods, a cross shaft supported from thefirebox, guide sleeves radially mounted on opposite ends of the shaft,the rods slidably projecting through the sleeves, a cross head betweenthe rods in spaced relation to the shaft, the power cylinder beingconnected between the shaft and cross head, a post on the yoke extendinginto the matrix blank and supporting the die block, and means to adjustthe rotative position of the shaft so as to correspondingly verticallyadjust the die block.

4. A power operated means for moving a die block into conformity withthe inner face of an annular matrix blank, such means comprising incombination with the die block a substantially vertical post, a shankfixed on the upper end of the post, the block being engaged by the outerend of the shank, a pair of diverging arms rigidly attached to the lowerend of the post, guide rods connected with the outer ends of the arms, asupport, a pair of spaced sleeves secured on the support, the guide rodsbeing slidably mounted through the sleeves, a cross head on the outerend of the guide rods, a power operated power jack connected to andextending between the support and cross head means mounting the supportfor rotation and means to controllably rotate the support.

5. A structure as in claim 4, in which said last named means comprises aworm gear fixed on the support concentric with the axis of rotationthereof, a worm engaging the gear and a shaft on which the worm ismounted journaled in a fixed position and having a hand wheel thereon.

EDWIN A. GLYNN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 231,499 Ried Aug. 24, 1880421,247 Cook Feb. 11, 1890 1,662,750 Kaufmann Mar. 13,1928 1,989,438Woock et al Jan. 29, 1935 2,173,377 Schultz et a1 Sept. 19, 19392,225,273 Jacobs Dec. 17, 1940 2,268,949 Lehmann Jan. 6, 1942

